Advanced small pipe grouting technology for tunnel construction;

The following paper introduces the strengthening mechanism and effect of liquefied foundation treatment by compaction grouting method,illustrates its strengthening spheres and grouting technology,and discusses its suitability and treatment effect in the treatment of medium liquefied sand foundation, in order to popularize the application of the treatment method.

Therefore reinforcement principles of karst roadbed are defined and the best grouting technology is developed for design and construction of the railway bed.

Also briefly discussed roadway borehole grouting techniques, as well as borehole water block up grouting process flow and parameters.

This paper introduces construction method of working pit and receiving pit,illustrates precast and hoisting of union coupling,proposes attentions of pipe jacking,discusses pipe jacking method and grouting technique after its construction,and illustrates surveying and control measures in the jacking.

This paper deals with simply the design and construction of the grouting treatment project of coal-mining hollowed zone under Wulumuqi-Kuitun highway,and make profound analysis for some problems such asgrouting pressure,grouting process,additional agent and so on in design and construction,and put as ward some suggestions as reference for other similar projects.